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nilfs2: super block operations fix endian bug
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ide / tx4939ide.c
blob0040a9a3e26e81a1ac0712d8f2eb3434f0f6a7fe
1 /*
2 * TX4939 internal IDE driver
3 * Based on RBTX49xx patch from CELF patch archive.
4 *
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
7 * for more details.
8 *
9 * (C) Copyright TOSHIBA CORPORATION 2005-2007
10 */
11
12 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <linux/ide.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/platform_device.h>
18 #include <linux/io.h>
19 #include <linux/scatterlist.h>
20
21 #include <asm/ide.h>
22
23 #define MODNAME "tx4939ide"
24
25 /* ATA Shadow Registers (8-bit except for Data which is 16-bit) */
26 #define TX4939IDE_Data 0x000
27 #define TX4939IDE_Error_Feature 0x001
28 #define TX4939IDE_Sec 0x002
29 #define TX4939IDE_LBA0 0x003
30 #define TX4939IDE_LBA1 0x004
31 #define TX4939IDE_LBA2 0x005
32 #define TX4939IDE_DevHead 0x006
33 #define TX4939IDE_Stat_Cmd 0x007
34 #define TX4939IDE_AltStat_DevCtl 0x402
35 /* H/W DMA Registers */
36 #define TX4939IDE_DMA_Cmd 0x800 /* 8-bit */
37 #define TX4939IDE_DMA_Stat 0x802 /* 8-bit */
38 #define TX4939IDE_PRD_Ptr 0x804 /* 32-bit */
39 /* ATA100 CORE Registers (16-bit) */
40 #define TX4939IDE_Sys_Ctl 0xc00
41 #define TX4939IDE_Xfer_Cnt_1 0xc08
42 #define TX4939IDE_Xfer_Cnt_2 0xc0a
43 #define TX4939IDE_Sec_Cnt 0xc10
44 #define TX4939IDE_Start_Lo_Addr 0xc18
45 #define TX4939IDE_Start_Up_Addr 0xc20
46 #define TX4939IDE_Add_Ctl 0xc28
47 #define TX4939IDE_Lo_Burst_Cnt 0xc30
48 #define TX4939IDE_Up_Burst_Cnt 0xc38
49 #define TX4939IDE_PIO_Addr 0xc88
50 #define TX4939IDE_H_Rst_Tim 0xc90
51 #define TX4939IDE_Int_Ctl 0xc98
52 #define TX4939IDE_Pkt_Cmd 0xcb8
53 #define TX4939IDE_Bxfer_Cnt_Hi 0xcc0
54 #define TX4939IDE_Bxfer_Cnt_Lo 0xcc8
55 #define TX4939IDE_Dev_TErr 0xcd0
56 #define TX4939IDE_Pkt_Xfer_Ctl 0xcd8
57 #define TX4939IDE_Start_TAddr 0xce0
58
59 /* bits for Int_Ctl */
60 #define TX4939IDE_INT_ADDRERR 0x80
61 #define TX4939IDE_INT_REACHMUL 0x40
62 #define TX4939IDE_INT_DEVTIMING 0x20
63 #define TX4939IDE_INT_UDMATERM 0x10
64 #define TX4939IDE_INT_TIMER 0x08
65 #define TX4939IDE_INT_BUSERR 0x04
66 #define TX4939IDE_INT_XFEREND 0x02
67 #define TX4939IDE_INT_HOST 0x01
68
69 #define TX4939IDE_IGNORE_INTS \
70 (TX4939IDE_INT_ADDRERR | TX4939IDE_INT_REACHMUL | \
71 TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_UDMATERM | \
72 TX4939IDE_INT_TIMER | TX4939IDE_INT_XFEREND)
73
74 #ifdef __BIG_ENDIAN
75 #define tx4939ide_swizzlel(a) ((a) ^ 4)
76 #define tx4939ide_swizzlew(a) ((a) ^ 6)
77 #define tx4939ide_swizzleb(a) ((a) ^ 7)
78 #else
79 #define tx4939ide_swizzlel(a) (a)
80 #define tx4939ide_swizzlew(a) (a)
81 #define tx4939ide_swizzleb(a) (a)
82 #endif
83
84 static u16 tx4939ide_readw(void __iomem *base, u32 reg)
85 {
86 return __raw_readw(base + tx4939ide_swizzlew(reg));
87 }
88 static u8 tx4939ide_readb(void __iomem *base, u32 reg)
89 {
90 return __raw_readb(base + tx4939ide_swizzleb(reg));
91 }
92 static void tx4939ide_writel(u32 val, void __iomem *base, u32 reg)
93 {
94 __raw_writel(val, base + tx4939ide_swizzlel(reg));
95 }
96 static void tx4939ide_writew(u16 val, void __iomem *base, u32 reg)
97 {
98 __raw_writew(val, base + tx4939ide_swizzlew(reg));
99 }
100 static void tx4939ide_writeb(u8 val, void __iomem *base, u32 reg)
101 {
102 __raw_writeb(val, base + tx4939ide_swizzleb(reg));
103 }
104
105 #define TX4939IDE_BASE(hwif) ((void __iomem *)(hwif)->extra_base)
106
107 static void tx4939ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
108 {
109 ide_hwif_t *hwif = drive->hwif;
110 int is_slave = drive->dn;
111 u32 mask, val;
112 u8 safe = pio;
113 ide_drive_t *pair;
114
115 pair = ide_get_pair_dev(drive);
116 if (pair)
117 safe = min(safe, ide_get_best_pio_mode(pair, 255, 4));
118 /*
119 * Update Command Transfer Mode for master/slave and Data
120 * Transfer Mode for this drive.
121 */
122 mask = is_slave ? 0x07f00000 : 0x000007f0;
123 val = ((safe << 8) | (pio << 4)) << (is_slave ? 16 : 0);
124 hwif->select_data = (hwif->select_data & ~mask) | val;
125 /* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
126 }
127
128 static void tx4939ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
129 {
130 ide_hwif_t *hwif = drive->hwif;
131 u32 mask, val;
132
133 /* Update Data Transfer Mode for this drive. */
134 if (mode >= XFER_UDMA_0)
135 val = mode - XFER_UDMA_0 + 8;
136 else
137 val = mode - XFER_MW_DMA_0 + 5;
138 if (drive->dn) {
139 mask = 0x00f00000;
140 val <<= 20;
141 } else {
142 mask = 0x000000f0;
143 val <<= 4;
144 }
145 hwif->select_data = (hwif->select_data & ~mask) | val;
146 /* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
147 }
148
149 static u16 tx4939ide_check_error_ints(ide_hwif_t *hwif)
150 {
151 void __iomem *base = TX4939IDE_BASE(hwif);
152 u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
153
154 if (ctl & TX4939IDE_INT_BUSERR) {
155 /* reset FIFO */
156 u16 sysctl = tx4939ide_readw(base, TX4939IDE_Sys_Ctl);
157
158 tx4939ide_writew(sysctl | 0x4000, base, TX4939IDE_Sys_Ctl);
159 mmiowb();
160 /* wait 12GBUSCLK (typ. 60ns @ GBUS200MHz, max 270ns) */
161 ndelay(270);
162 tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
163 }
164 if (ctl & (TX4939IDE_INT_ADDRERR |
165 TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_BUSERR))
166 pr_err("%s: Error interrupt %#x (%s%s%s )\n",
167 hwif->name, ctl,
168 ctl & TX4939IDE_INT_ADDRERR ? " Address-Error" : "",
169 ctl & TX4939IDE_INT_DEVTIMING ? " DEV-Timing" : "",
170 ctl & TX4939IDE_INT_BUSERR ? " Bus-Error" : "");
171 return ctl;
172 }
173
174 static void tx4939ide_clear_irq(ide_drive_t *drive)
175 {
176 ide_hwif_t *hwif;
177 void __iomem *base;
178 u16 ctl;
179
180 /*
181 * tx4939ide_dma_test_irq() and tx4939ide_dma_end() do all job
182 * for DMA case.
183 */
184 if (drive->waiting_for_dma)
185 return;
186 hwif = drive->hwif;
187 base = TX4939IDE_BASE(hwif);
188 ctl = tx4939ide_check_error_ints(hwif);
189 tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
190 }
191
192 static u8 tx4939ide_cable_detect(ide_hwif_t *hwif)
193 {
194 void __iomem *base = TX4939IDE_BASE(hwif);
195
196 return tx4939ide_readw(base, TX4939IDE_Sys_Ctl) & 0x2000 ?
197 ATA_CBL_PATA40 : ATA_CBL_PATA80;
198 }
199
200 #ifdef __BIG_ENDIAN
201 static void tx4939ide_dma_host_set(ide_drive_t *drive, int on)
202 {
203 ide_hwif_t *hwif = drive->hwif;
204 u8 unit = drive->dn;
205 void __iomem *base = TX4939IDE_BASE(hwif);
206 u8 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
207
208 if (on)
209 dma_stat |= (1 << (5 + unit));
210 else
211 dma_stat &= ~(1 << (5 + unit));
212
213 tx4939ide_writeb(dma_stat, base, TX4939IDE_DMA_Stat);
214 }
215 #else
216 #define tx4939ide_dma_host_set ide_dma_host_set
217 #endif
218
219 static u8 tx4939ide_clear_dma_status(void __iomem *base)
220 {
221 u8 dma_stat;
222
223 /* read DMA status for INTR & ERROR flags */
224 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
225 /* clear INTR & ERROR flags */
226 tx4939ide_writeb(dma_stat | ATA_DMA_INTR | ATA_DMA_ERR, base,
227 TX4939IDE_DMA_Stat);
228 /* recover intmask cleared by writing to bit2 of DMA_Stat */
229 tx4939ide_writew(TX4939IDE_IGNORE_INTS << 8, base, TX4939IDE_Int_Ctl);
230 return dma_stat;
231 }
232
233 #ifdef __BIG_ENDIAN
234 /* custom ide_build_dmatable to handle swapped layout */
235 static int tx4939ide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
236 {
237 ide_hwif_t *hwif = drive->hwif;
238 u32 *table = (u32 *)hwif->dmatable_cpu;
239 unsigned int count = 0;
240 int i;
241 struct scatterlist *sg;
242
243 for_each_sg(hwif->sg_table, sg, cmd->sg_nents, i) {
244 u32 cur_addr, cur_len, bcount;
245
246 cur_addr = sg_dma_address(sg);
247 cur_len = sg_dma_len(sg);
248
249 /*
250 * Fill in the DMA table, without crossing any 64kB boundaries.
251 */
252
253 while (cur_len) {
254 if (count++ >= PRD_ENTRIES)
255 goto use_pio_instead;
256
257 bcount = 0x10000 - (cur_addr & 0xffff);
258 if (bcount > cur_len)
259 bcount = cur_len;
260 /*
261 * This workaround for zero count seems required.
262 * (standard ide_build_dmatable does it too)
263 */
264 if (bcount == 0x10000)
265 bcount = 0x8000;
266 *table++ = bcount & 0xffff;
267 *table++ = cur_addr;
268 cur_addr += bcount;
269 cur_len -= bcount;
270 }
271 }
272
273 if (count) {
274 *(table - 2) |= 0x80000000;
275 return count;
276 }
277
278 use_pio_instead:
279 printk(KERN_ERR "%s: %s\n", drive->name,
280 count ? "DMA table too small" : "empty DMA table?");
281
282 return 0; /* revert to PIO for this request */
283 }
284 #else
285 #define tx4939ide_build_dmatable ide_build_dmatable
286 #endif
287
288 static int tx4939ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
289 {
290 ide_hwif_t *hwif = drive->hwif;
291 void __iomem *base = TX4939IDE_BASE(hwif);
292 u8 rw = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 0 : ATA_DMA_WR;
293
294 /* fall back to PIO! */
295 if (tx4939ide_build_dmatable(drive, cmd) == 0)
296 return 1;
297
298 /* PRD table */
299 tx4939ide_writel(hwif->dmatable_dma, base, TX4939IDE_PRD_Ptr);
300
301 /* specify r/w */
302 tx4939ide_writeb(rw, base, TX4939IDE_DMA_Cmd);
303
304 /* clear INTR & ERROR flags */
305 tx4939ide_clear_dma_status(base);
306
307 tx4939ide_writew(SECTOR_SIZE / 2, base, drive->dn ?
308 TX4939IDE_Xfer_Cnt_2 : TX4939IDE_Xfer_Cnt_1);
309
310 tx4939ide_writew(cmd->rq->nr_sectors, base, TX4939IDE_Sec_Cnt);
311
312 return 0;
313 }
314
315 static int tx4939ide_dma_end(ide_drive_t *drive)
316 {
317 ide_hwif_t *hwif = drive->hwif;
318 u8 dma_stat, dma_cmd;
319 void __iomem *base = TX4939IDE_BASE(hwif);
320 u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
321
322 /* get DMA command mode */
323 dma_cmd = tx4939ide_readb(base, TX4939IDE_DMA_Cmd);
324 /* stop DMA */
325 tx4939ide_writeb(dma_cmd & ~ATA_DMA_START, base, TX4939IDE_DMA_Cmd);
326
327 /* read and clear the INTR & ERROR bits */
328 dma_stat = tx4939ide_clear_dma_status(base);
329
330 wmb();
331
332 /* verify good DMA status */
333 if ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) == 0 &&
334 (ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
335 (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
336 /* INT_IDE lost... bug? */
337 return 0;
338 return ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) !=
339 ATA_DMA_INTR) ? 0x10 | dma_stat : 0;
340 }
341
342 /* returns 1 if DMA IRQ issued, 0 otherwise */
343 static int tx4939ide_dma_test_irq(ide_drive_t *drive)
344 {
345 ide_hwif_t *hwif = drive->hwif;
346 void __iomem *base = TX4939IDE_BASE(hwif);
347 u16 ctl, ide_int;
348 u8 dma_stat, stat;
349 int found = 0;
350
351 ctl = tx4939ide_check_error_ints(hwif);
352 ide_int = ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST);
353 switch (ide_int) {
354 case TX4939IDE_INT_HOST:
355 /* On error, XFEREND might not be asserted. */
356 stat = tx4939ide_readb(base, TX4939IDE_AltStat_DevCtl);
357 if ((stat & (ATA_BUSY | ATA_DRQ | ATA_ERR)) == ATA_ERR)
358 found = 1;
359 else
360 /* Wait for XFEREND (Mask HOST and unmask XFEREND) */
361 ctl &= ~TX4939IDE_INT_XFEREND << 8;
362 ctl |= ide_int << 8;
363 break;
364 case TX4939IDE_INT_HOST | TX4939IDE_INT_XFEREND:
365 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
366 if (!(dma_stat & ATA_DMA_INTR))
367 pr_warning("%s: weird interrupt status. "
368 "DMA_Stat %#02x int_ctl %#04x\n",
369 hwif->name, dma_stat, ctl);
370 found = 1;
371 break;
372 }
373 /*
374 * Do not clear XFEREND, HOST now. They will be cleared by
375 * clearing bit2 of DMA_Stat.
376 */
377 ctl &= ~ide_int;
378 tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
379 return found;
380 }
381
382 #ifdef __BIG_ENDIAN
383 static u8 tx4939ide_dma_sff_read_status(ide_hwif_t *hwif)
384 {
385 void __iomem *base = TX4939IDE_BASE(hwif);
386
387 return tx4939ide_readb(base, TX4939IDE_DMA_Stat);
388 }
389 #else
390 #define tx4939ide_dma_sff_read_status ide_dma_sff_read_status
391 #endif
392
393 static void tx4939ide_init_hwif(ide_hwif_t *hwif)
394 {
395 void __iomem *base = TX4939IDE_BASE(hwif);
396
397 /* Soft Reset */
398 tx4939ide_writew(0x8000, base, TX4939IDE_Sys_Ctl);
399 mmiowb();
400 /* at least 20 GBUSCLK (typ. 100ns @ GBUS200MHz, max 450ns) */
401 ndelay(450);
402 tx4939ide_writew(0x0000, base, TX4939IDE_Sys_Ctl);
403 /* mask some interrupts and clear all interrupts */
404 tx4939ide_writew((TX4939IDE_IGNORE_INTS << 8) | 0xff, base,
405 TX4939IDE_Int_Ctl);
406
407 tx4939ide_writew(0x0008, base, TX4939IDE_Lo_Burst_Cnt);
408 tx4939ide_writew(0, base, TX4939IDE_Up_Burst_Cnt);
409 }
410
411 static int tx4939ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
412 {
413 hwif->dma_base =
414 hwif->extra_base + tx4939ide_swizzleb(TX4939IDE_DMA_Cmd);
415 /*
416 * Note that we cannot use ATA_DMA_TABLE_OFS, ATA_DMA_STATUS
417 * for big endian.
418 */
419 return ide_allocate_dma_engine(hwif);
420 }
421
422 static void tx4939ide_tf_load_fixup(ide_drive_t *drive)
423 {
424 ide_hwif_t *hwif = drive->hwif;
425 void __iomem *base = TX4939IDE_BASE(hwif);
426 u16 sysctl = hwif->select_data >> (drive->dn ? 16 : 0);
427
428 /*
429 * Fix ATA100 CORE System Control Register. (The write to the
430 * Device/Head register may write wrong data to the System
431 * Control Register)
432 * While Sys_Ctl is written here, dev_select() is not needed.
433 */
434 tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
435 }
436
437 #ifdef __BIG_ENDIAN
438
439 /* custom iops (independent from SWAP_IO_SPACE) */
440 static u8 tx4939ide_inb(unsigned long port)
441 {
442 return __raw_readb((void __iomem *)port);
443 }
444
445 static void tx4939ide_outb(u8 value, unsigned long port)
446 {
447 __raw_writeb(value, (void __iomem *)port);
448 }
449
450 static void tx4939ide_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
451 {
452 ide_hwif_t *hwif = drive->hwif;
453 struct ide_io_ports *io_ports = &hwif->io_ports;
454 struct ide_taskfile *tf = &cmd->tf;
455 u8 HIHI = cmd->tf_flags & IDE_TFLAG_LBA48 ? 0xE0 : 0xEF;
456
457 if (cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
458 HIHI = 0xFF;
459
460 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
461 tx4939ide_outb(tf->hob_feature, io_ports->feature_addr);
462 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
463 tx4939ide_outb(tf->hob_nsect, io_ports->nsect_addr);
464 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
465 tx4939ide_outb(tf->hob_lbal, io_ports->lbal_addr);
466 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
467 tx4939ide_outb(tf->hob_lbam, io_ports->lbam_addr);
468 if (cmd->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
469 tx4939ide_outb(tf->hob_lbah, io_ports->lbah_addr);
470
471 if (cmd->tf_flags & IDE_TFLAG_OUT_FEATURE)
472 tx4939ide_outb(tf->feature, io_ports->feature_addr);
473 if (cmd->tf_flags & IDE_TFLAG_OUT_NSECT)
474 tx4939ide_outb(tf->nsect, io_ports->nsect_addr);
475 if (cmd->tf_flags & IDE_TFLAG_OUT_LBAL)
476 tx4939ide_outb(tf->lbal, io_ports->lbal_addr);
477 if (cmd->tf_flags & IDE_TFLAG_OUT_LBAM)
478 tx4939ide_outb(tf->lbam, io_ports->lbam_addr);
479 if (cmd->tf_flags & IDE_TFLAG_OUT_LBAH)
480 tx4939ide_outb(tf->lbah, io_ports->lbah_addr);
481
482 if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE) {
483 tx4939ide_outb((tf->device & HIHI) | drive->select,
484 io_ports->device_addr);
485 tx4939ide_tf_load_fixup(drive);
486 }
487 }
488
489 static void tx4939ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
490 {
491 ide_hwif_t *hwif = drive->hwif;
492 struct ide_io_ports *io_ports = &hwif->io_ports;
493 struct ide_taskfile *tf = &cmd->tf;
494
495 /* be sure we're looking at the low order bits */
496 tx4939ide_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
497
498 if (cmd->tf_flags & IDE_TFLAG_IN_ERROR)
499 tf->error = tx4939ide_inb(io_ports->feature_addr);
500 if (cmd->tf_flags & IDE_TFLAG_IN_NSECT)
501 tf->nsect = tx4939ide_inb(io_ports->nsect_addr);
502 if (cmd->tf_flags & IDE_TFLAG_IN_LBAL)
503 tf->lbal = tx4939ide_inb(io_ports->lbal_addr);
504 if (cmd->tf_flags & IDE_TFLAG_IN_LBAM)
505 tf->lbam = tx4939ide_inb(io_ports->lbam_addr);
506 if (cmd->tf_flags & IDE_TFLAG_IN_LBAH)
507 tf->lbah = tx4939ide_inb(io_ports->lbah_addr);
508 if (cmd->tf_flags & IDE_TFLAG_IN_DEVICE)
509 tf->device = tx4939ide_inb(io_ports->device_addr);
510
511 if (cmd->tf_flags & IDE_TFLAG_LBA48) {
512 tx4939ide_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
513
514 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_ERROR)
515 tf->hob_error = tx4939ide_inb(io_ports->feature_addr);
516 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
517 tf->hob_nsect = tx4939ide_inb(io_ports->nsect_addr);
518 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
519 tf->hob_lbal = tx4939ide_inb(io_ports->lbal_addr);
520 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
521 tf->hob_lbam = tx4939ide_inb(io_ports->lbam_addr);
522 if (cmd->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
523 tf->hob_lbah = tx4939ide_inb(io_ports->lbah_addr);
524 }
525 }
526
527 static void tx4939ide_input_data_swap(ide_drive_t *drive, struct request *rq,
528 void *buf, unsigned int len)
529 {
530 unsigned long port = drive->hwif->io_ports.data_addr;
531 unsigned short *ptr = buf;
532 unsigned int count = (len + 1) / 2;
533
534 while (count--)
535 *ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
536 __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
537 }
538
539 static void tx4939ide_output_data_swap(ide_drive_t *drive, struct request *rq,
540 void *buf, unsigned int len)
541 {
542 unsigned long port = drive->hwif->io_ports.data_addr;
543 unsigned short *ptr = buf;
544 unsigned int count = (len + 1) / 2;
545
546 while (count--) {
547 __raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
548 ptr++;
549 }
550 __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
551 }
552
553 static const struct ide_tp_ops tx4939ide_tp_ops = {
554 .exec_command = ide_exec_command,
555 .read_status = ide_read_status,
556 .read_altstatus = ide_read_altstatus,
557 .write_devctl = ide_write_devctl,
558
559 .dev_select = ide_dev_select,
560 .tf_load = tx4939ide_tf_load,
561 .tf_read = tx4939ide_tf_read,
562
563 .input_data = tx4939ide_input_data_swap,
564 .output_data = tx4939ide_output_data_swap,
565 };
566
567 #else /* __LITTLE_ENDIAN */
568
569 static void tx4939ide_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
570 {
571 ide_tf_load(drive, cmd);
572
573 if (cmd->tf_flags & IDE_TFLAG_OUT_DEVICE)
574 tx4939ide_tf_load_fixup(drive);
575 }
576
577 static const struct ide_tp_ops tx4939ide_tp_ops = {
578 .exec_command = ide_exec_command,
579 .read_status = ide_read_status,
580 .read_altstatus = ide_read_altstatus,
581 .write_devctl = ide_write_devctl,
582
583 .dev_select = ide_dev_select,
584 .tf_load = tx4939ide_tf_load,
585 .tf_read = ide_tf_read,
586
587 .input_data = ide_input_data,
588 .output_data = ide_output_data,
589 };
590
591 #endif /* __LITTLE_ENDIAN */
592
593 static const struct ide_port_ops tx4939ide_port_ops = {
594 .set_pio_mode = tx4939ide_set_pio_mode,
595 .set_dma_mode = tx4939ide_set_dma_mode,
596 .clear_irq = tx4939ide_clear_irq,
597 .cable_detect = tx4939ide_cable_detect,
598 };
599
600 static const struct ide_dma_ops tx4939ide_dma_ops = {
601 .dma_host_set = tx4939ide_dma_host_set,
602 .dma_setup = tx4939ide_dma_setup,
603 .dma_start = ide_dma_start,
604 .dma_end = tx4939ide_dma_end,
605 .dma_test_irq = tx4939ide_dma_test_irq,
606 .dma_lost_irq = ide_dma_lost_irq,
607 .dma_timer_expiry = ide_dma_sff_timer_expiry,
608 .dma_sff_read_status = tx4939ide_dma_sff_read_status,
609 };
610
611 static const struct ide_port_info tx4939ide_port_info __initdata = {
612 .init_hwif = tx4939ide_init_hwif,
613 .init_dma = tx4939ide_init_dma,
614 .port_ops = &tx4939ide_port_ops,
615 .dma_ops = &tx4939ide_dma_ops,
616 .tp_ops = &tx4939ide_tp_ops,
617 .host_flags = IDE_HFLAG_MMIO,
618 .pio_mask = ATA_PIO4,
619 .mwdma_mask = ATA_MWDMA2,
620 .udma_mask = ATA_UDMA5,
621 .chipset = ide_generic,
622 };
623
624 static int __init tx4939ide_probe(struct platform_device *pdev)
625 {
626 hw_regs_t hw;
627 hw_regs_t *hws[] = { &hw, NULL, NULL, NULL };
628 struct ide_host *host;
629 struct resource *res;
630 int irq, ret;
631 unsigned long mapbase;
632
633 irq = platform_get_irq(pdev, 0);
634 if (irq < 0)
635 return -ENODEV;
636 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
637 if (!res)
638 return -ENODEV;
639
640 if (!devm_request_mem_region(&pdev->dev, res->start,
641 res->end - res->start + 1, "tx4938ide"))
642 return -EBUSY;
643 mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
644 res->end - res->start + 1);
645 if (!mapbase)
646 return -EBUSY;
647 memset(&hw, 0, sizeof(hw));
648 hw.io_ports.data_addr =
649 mapbase + tx4939ide_swizzlew(TX4939IDE_Data);
650 hw.io_ports.error_addr =
651 mapbase + tx4939ide_swizzleb(TX4939IDE_Error_Feature);
652 hw.io_ports.nsect_addr =
653 mapbase + tx4939ide_swizzleb(TX4939IDE_Sec);
654 hw.io_ports.lbal_addr =
655 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA0);
656 hw.io_ports.lbam_addr =
657 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA1);
658 hw.io_ports.lbah_addr =
659 mapbase + tx4939ide_swizzleb(TX4939IDE_LBA2);
660 hw.io_ports.device_addr =
661 mapbase + tx4939ide_swizzleb(TX4939IDE_DevHead);
662 hw.io_ports.command_addr =
663 mapbase + tx4939ide_swizzleb(TX4939IDE_Stat_Cmd);
664 hw.io_ports.ctl_addr =
665 mapbase + tx4939ide_swizzleb(TX4939IDE_AltStat_DevCtl);
666 hw.irq = irq;
667 hw.dev = &pdev->dev;
668
669 pr_info("TX4939 IDE interface (base %#lx, irq %d)\n", mapbase, irq);
670 host = ide_host_alloc(&tx4939ide_port_info, hws);
671 if (!host)
672 return -ENOMEM;
673 /* use extra_base for base address of the all registers */
674 host->ports[0]->extra_base = mapbase;
675 ret = ide_host_register(host, &tx4939ide_port_info, hws);
676 if (ret) {
677 ide_host_free(host);
678 return ret;
679 }
680 platform_set_drvdata(pdev, host);
681 return 0;
682 }
683
684 static int __exit tx4939ide_remove(struct platform_device *pdev)
685 {
686 struct ide_host *host = platform_get_drvdata(pdev);
687
688 ide_host_remove(host);
689 return 0;
690 }
691
692 #ifdef CONFIG_PM
693 static int tx4939ide_resume(struct platform_device *dev)
694 {
695 struct ide_host *host = platform_get_drvdata(dev);
696 ide_hwif_t *hwif = host->ports[0];
697
698 tx4939ide_init_hwif(hwif);
699 return 0;
700 }
701 #else
702 #define tx4939ide_resume NULL
703 #endif
704
705 static struct platform_driver tx4939ide_driver = {
706 .driver = {
707 .name = MODNAME,
708 .owner = THIS_MODULE,
709 },
710 .remove = __exit_p(tx4939ide_remove),
711 .resume = tx4939ide_resume,
712 };
713
714 static int __init tx4939ide_init(void)
715 {
716 return platform_driver_probe(&tx4939ide_driver, tx4939ide_probe);
717 }
718
719 static void __exit tx4939ide_exit(void)
720 {
721 platform_driver_unregister(&tx4939ide_driver);
722 }
723
724 module_init(tx4939ide_init);
725 module_exit(tx4939ide_exit);
726
727 MODULE_DESCRIPTION("TX4939 internal IDE driver");
728 MODULE_LICENSE("GPL");
729 MODULE_ALIAS("platform:tx4939ide");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree